Apparatus and method for locating and setting a tool in a profile

ABSTRACT

An intervention tool is provided having one or more packing elements; said device being moveable between a first position in which the device is positively locatable within a profile, and a second position wherein the device is settable in a blank casing that lacks a profile, wherein movement between the first position and the second position is controlled by axial movement of the intervention tool. A device is further provided for positively locating within a profile, wherein said device comprises one or more locator mechanisms; one or more slips; one or more packing elements; and a stopping mechanism; wherein said one or more locator mechanisms are locatable within said profile and wherein said stopping mechanism prevents engagement of said one or more slips and said one or more packing elements unit said one or more locator mechanisms are located in the profile. A method is provided for applying downhole isolation, said method comprising the steps of running an intervention tool downhole, said intervention tool comprising one or more packing elements; locating one or more locating mechanisms on the device into one or more profiles by shifting said device axially; engaging the one or more packing elements by shifting said device axially after the locating mechanisms are located within the profiles; disengaging said one or more packing elements by shifting said device axially; and moving said device to another downhole location.

FIELD OF THE INVENTION

The present invention relates to an apparatus and method for locatingand setting a tool such as a bottom hole assembly or intervention toolwithin a downhole tool and within a blank pipe.

BACKGROUND OF THE INVENTION

Downhole oil and gas production operations, and particularly those inmulti-stage horizontal wells, require the stimulation and production ofone or more zones of a hydrocarbon bearing formation. In many cases thisis done by running a liner or casing string downhole, in which thecasing string comprises one or more downhole tools, including but notlimited to perforating devices, ported sleeves or collars, at spacedintervals along the wellbore. The location of the downhole tools iscommonly set to align with the formation zones to be stimulated orproduced. The tools must be manipulated in order to be opened or closedas required. In some instances, this is achieved by running a bottomhole assembly, also known as an intervention tool, down through thecasing string, locating the downhole tool to be manipulated andmanipulating the tool by any number of means including use of mechanicalforce on the intervention tool, or by hydraulic pressure.

The bottom hole assembly (BHA), or intervention tool, also known by anynumber of other names, is typically run on a tubing string that can becoil tubing or other tubing. The intervention tool is sent down insidethe casing string for the purposes of locating inside and interactingwith the downhole tool adjacent the formation zone to be treated orproduced. Once located near or inside the downhole tool, theintervention tool typically engages against the downhole tool or againstthe casing near the downhole tool, and then the intervention tool iseither mechanically manipulated or hydraulic pressure is used tomanipulate the downhole tool as required to stimulate the oil-bearingformation, or to produce hydrocarbons from the formation. Aftertreatment, it may also be desirable to again manipulate the downholetool. In many cases, it is also desirable to locate and set anintervention tool in a casing string or a section of blank pipe.

A key goal in using an intervention tool is to accurately locate theintervention tool inside the downhole tool or inside section of casingor blank pipe before going through the process of setting theintervention tool and trying to manipulate any downhole tools. Sincethere can be miles and miles of casing string with any number ofdownhole tools and lengths of blank pipe along it, this can bedifficult.

Furthermore, due to reaction time commonly seen in coil tubingdeployment, there is a tendency for the tubing on which the interventiontool is run downhole to travel downhole even after it has been locatedin the desired downhole tool. This extra travel causes the interventiontool to ‘jump’ out of its proper location in the downhole tool.

In some prior art, intervention tools use drag blocks and locator blocksto locate the intervention tool in the downhole tool. However, in manyof these cases, extra length is required to account for coil tubingtravel, leading to larger, less flexible sleeves and downhole tools.These have also been proven less successful in operation. Also, thistype of prior art system does not ensure that any slips and packers onthe intervention tool won't set before the locator blocks are located.

Other locating means that have been used in the past include locatingdogs, latching mechanisms or by estimating the location of the downholetool in the wellbore and feeding a predetermined length of deploymentstring to reach the frac sleeve.

There is therefore still a need for intervention tool and downhole toolsystems that can positively locate an intervention tool inside adownhole tool or inside casing string, and for systems that ensures thatslips and packing elements cannot be set before locating.

SUMMARY

An intervention tool is provided having one or more packing elements;said device being moveable between a first position in which the deviceis positively locatable within a profile, and a second position whereinthe device is settable in a blank casing that lacks a profile, whereinmovement between the first position and the second position iscontrolled by axial movement of the intervention tool.

A device is further provided for positively locating within a profile,wherein said device comprises one or more locator mechanisms; one ormore slips; one or more packing elements; and a stopping mechanism;wherein said one or more locator mechanisms are locatable within saidprofile and wherein said stopping mechanism prevents engagement of saidone or more slips and said one or more packing elements unit said one ormore locator mechanisms are located in the profile.

A method is provided for applying downhole isolation, said methodcomprising the steps of running an intervention tool downhole, saidintervention tool comprising one or more packing elements; locating oneor more locating mechanisms on the device into one or more profiles byshifting said device axially; engaging the one or more packing elementsby shifting said device axially after the locating mechanisms arelocated within the profiles; disengaging said one or more packingelements by shifting said device axially; and moving said device toanother downhole location.

It is to be understood that other aspects of the present invention willbecome readily apparent to those skilled in the art from the followingdetailed description, wherein various embodiments of the invention areshown and described by way of illustration. As will be realized, theinvention is capable for other and different embodiments and its severaldetails are capable of modification in various other respects, allwithout departing from the spirit and scope of the present invention.Accordingly the drawings and detailed description are to be regarded asillustrative in nature and not as restrictive.

BRIEF DESCRIPTION OF THE DRAWINGS

A further, detailed, description of the invention, briefly describedabove, will follow by reference to the following drawings of specificembodiments of the invention. The drawings depict only typicalembodiments of the invention and are therefore not to be consideredlimiting of its scope. In the drawings:

FIG. 1 is a cross sectional view of one embodiment of an interventiontool of the present invention;

FIG. 2A is a cross sectional elevational view of one embodiment of anintervention tool of the present invention, in a compressed but neutralposition within a blank section casing string;

FIG. 2B is a cross sectional end view of one embodiment of the locatorsupport relative to the locator mechanism in the position of FIG. 2A;

FIG. 3A is a cross sectional elevational view of one embodiment of anintervention tool of the present invention, in a tension position;

FIG. 3B is a cross sectional end view of one embodiment of the locatorsupport relative to the locator mechanism in the position of FIG. 3A;

FIG. 4A is a cross sectional elevational view of one embodiment of anintervention tool of the present invention in compression prior to beinglocated in a profile;

FIG. 4B is a cross sectional end view of one embodiment of the locatorsupport relative to the locator mechanism in the position of FIG. 4A;

FIG. 5A is a cross sectional elevational view of one embodiment of anintervention tool of the present invention in compression and locatedwithin a profile, but just prior to slips and packer being set;

FIG. 5B is a cross sectional end view of one embodiment of the locatorsupport relative to the locator mechanism in the position of FIG. 5A;

FIG. 6A is a cross sectional elevational view of one embodiment of anintervention tool of the present invention in compression and locatedwithin a profile, with the slips and packing elements set;

FIG. 6B is a cross sectional end view of one embodiment of the locatorsupport relative to the locator mechanism in the position of FIG. 6A;

FIG. 7A is a cross sectional elevational view of one embodiment of anintervention tool of the present invention in compression and locatedwithin a profile of a downhole tool, with the slips and packing elementsset;

FIG. 7B is a cross sectional end view of one embodiment of the locatorsupport relative to the locator mechanism in the position of FIG. 7A;

FIG. 8A is a cross sectional elevational view of one embodiment of anintervention tool of the present invention, within a blank sectioncasing string, in a compressed position with the slips and packingelements set against an inner surface of the blank casing section;

FIG. 8B is a cross sectional end view of one embodiment of the locatorsupport relative to the locator mechanism in the position of FIG. 8A;

FIGS. 9A and 9B are cross sectional end views of one embodiment of thelocator mechanism of the present invention in extended and collapsedviews respectively;

FIG. 10 is a cross sectional end view of one embodiment of the locatorsupport of the present invention;

FIG. 11A is a cross sectional elevational view of one embodiment of theintervention tool of the present invention, within a blank section ofcasing string, in a tension neutral position;

FIGS. 11B to 11C are cross sectional end views of various positions ofone embodiment of the locator support relative to the locator mechanism;and

FIG. 12 illustrates J-pin and J-slot positions for the various steps ofa method of the present invention.

The drawing is not necessarily to scale and in some instancesproportions may have been exaggerated in order more clearly to depictcertain features.

DETAILED DESCRIPTION OF VARIOUS EMBODIMENTS

The description that follows and the embodiments described therein areprovided by way of illustration of an example, or examples, ofparticular embodiments of the principles of various aspects of thepresent invention. These examples are provided for the purposes ofexplanation, and not of limitation, of those principles and of theinvention in its various aspects.

The present invention provides a device for positively locating anintervention tool in a profile. The profile can be on a downhole tool oron a casing. The present intervention tool is also capable of setting ina blank section of casing or pipe.

The present invention more specifically provides a locator mechanism andlocator support arrangement that positively locates the interventiontool within a profile. The locator support ensures that the locatormechanism cannot dislocate once located. Furthermore, the locatormechanism and locator support arrangement vis a vis slips and packingelement of the intervention tool prevents the slips and packing elementfrom setting until the intervention tool is positively located in theprofile. This not only ensures a positive locate, but also ensure nosetting until there is a positive locate.

Although some embodiments of the present intervention tool are describedand illustrated in the context of use with a ported sleeve, it would bewell understood by a person of skill in the art that the presentintervention tool could be used with any number of types of downholetools that require locating and activation of some kind, including toolsused in straddle perforation applications, any downhole tool in which apacker is required to set to create a pressure differential, or anydownhole tool in which manipulation of the tool requires that a profileon the tool be engaged and mechanically manipulated. And the presenttool can be shifted from locating in a downhole tool or casing having aprofile, to setting inside a section of blank casing, wherein saidshifting is accomplished merely be axial movement of the present tool.

With reference to FIG. 1, which illustrates one embodiment of anintervention tool 2 of the present invention, the intervention tool 2comprises an inner mandrel section 4 having an outer surface and acontinuous axial inner bore 6. The mandrel 4 is preferably at leastpartially radially surrounded by a drag assembly 8 that is slidablyarranged over the mandrel 4 outer surface. The drag assembly 8 houses alocator mechanism 10 and a set of one or more slips 12. In a preferredembodiment, the mandrel 4 is both axially and rotatably moveable vis avis the drag assembly 8. In a more preferred embodiment, the locatormechanism 10 can be a set of one or more resilient collet fingers,however, it would be understood that locator blocks or dogs with springswould be just as suitable and are including in the scope of the presentinvention.

With reference to FIG. 12, in a further preferred embodiment, a J-pinand J-slot arrangement 30 between the mandrel 4 and drag assembly 8 canguide movement of the mandrel 4 relative to the drag assembly 8 andensures that the mandrel 4 position is held until a further compressiveor tensile force is applied to move the mandrel 4 to the next position.By holding various positions between the mandrel 4 and the drag assembly8, the J-pin and J-slot arrangement 30 ensures that the presentintervention tool can be run downhole and located in a downhole toolwithout inadvertently setting slips 12 or packing elements 14 prior tolocating. The arrangement 30 also allows shifting the intervention toolfrom locating in a profile to setting in a section of blank casing byonly applying an axial tensile or compressive force.

The mandrel 4 houses on its outer surface a packing element 14 and aslip setting cone 16. Preferably a locator support 18 is eitherintegrally part of, or separate to but supported on, the outer surfaceof the mandrel 4. In a preferred embodiment, the locator support 18 isin the form of a collet support lug ring having one or more colletsupport lugs, however it would be understood by a person of skill in theart that any number of support devices and configurations to support thelocator mechanism are possible and are included within the scope of thisinvention.

A bypass 20 is preferably moveably located within the inner bore 6 ofthe mandrel 4 and is moveable between a closed position which blocksfluid flow through the inner bore 6 to an open position which allowsflow through the inner bore 6. The locator support 18 together with themandrel 4 is moveable and rotatable relative to the locator mechanism 10on the drag assembly 8, such that the locator support 18 may be able topass under and beyond the locator mechanism 10 when the locatormechanism is in a collapsed position, sit directly under the locatormechanism 10 to support it in an extended position or abut an uphole ordownhole end of the locator mechanism 10.

The locator support 18, seen in FIG. 10 preferably has a full boreinside diameter that allows for full fluid flow through inner bore whenthe bypass 20 is in the open position. The full bore of the locatorsupport 18 ensure that the inner bore 6 of the present intervention tooldoes not get clogged up with sand from the formation, and ensures noflow restrictions.

With reference to FIG. 7, the intervention tool 2 of the presentinvention can be used inside a downhole tool 22. The downhole tool ofFIG. 7 is depicted as a ported sleeve, however it would be understoodthat any number of downhole tools 22 can be located and manipulated bythe present invention.

In the embodiment of FIG. 7, the particular ported sleeve embodiment ofthe downhole tool 22 has a valve 24 that is moveable to close and open aport 26. When the valve 24 in in the open position, the port 26 is openand fluid can flow from either the inner bore 6 of the mandrel 4 or froman annulus 28 between the mandrel 4 an inner surface of the downholetool 22 through the port 26 and out to the formation to be treated orstimulated. While the present figures depicts the valve 24 of thedownhole tool 22 as being an inner valve sandwiched between an outer andinner layer of the downhole tool 22, it would be well understood by aperson of skill in the art that an exposed valve would be just aseffective and is covered in the scope of the present application.

It would also be understood by a person of skill in the art that thedownhole tool 22 can be a production sleeve in which case, hydrocarbonproduct can flow from the formation, through the port 26 and back up tosurface through the tubing on which the intervention tool 2 is run, orthrough the casing 36 on which the downhole tool 22 is run. Suchembodiments are also covered by the scope of the present invention.

The downhole tool 22 further comprises a profile 32 on an inner surfacethereof, for receiving the locator mechanism 10, which can expandradially into profile 32, to positively locate the intervention tool 2inside the downhole tool 22, prior to setting any slips 12 or packingelements 14.

With reference to FIG. 2, in one embodiment of a method of the presentinvention, the intervention tool 2 is run into the wellbore casing 36 ina compressed, but neutral position. In this position, cone 16 cannotcontact the slips 12 and packing element 14 cannot be set. Theintervention tool 2 is run down to the downhole tool 22 in thisposition. The locator mechanism 10 of the drag assembly 8, which arepreferably radially resilient, are collapsed and preferably act as adrag mechanism to allow the mandrel 4 to move relative the drag assembly8 for subsequent operations and positions. While the locator mechanismmay extend to locate in a profile 32 of the casing 36, as depicted inFIG. 2b , the locator support 18 is positioned such that it does notsupport the locator mechanism 10 in the extended position, and thusfurther downhole movement of the intervention tool 2 will cause thelocator mechanism 10 to collapse again and allow the device to continueto travel downhole to a desired location. For the purposes of thepresent invention, a casing connection 42 can serve as a locatingprofile 32 for locating the intervention tool 2 in the casing section36. In a preferred embodiment, the locator mechanism 10 may be machinedto an exact shape to fit into a specific profile 32 of a casingconnection 42 or a downhole tool 22 (depicted in FIG. 7).

As the intervention tool 2 is moved downhole, the mandrel 4 will movedownhole relative to the drag assembly 8 until it hits a stoppingmechanism in the form of the J-pin and J-slot arrangement 30 between themandrel 4 and drag assembly 8. The mandrel 4 is unable to travel downfar enough to contact the cone 16; therefore, the packing element 14cannot set while running downhole.

With reference to FIG. 3, in a next step the intervention tool 2 ispulled into tension and the mandrel 4 and locator support 18 rotaterelative to the drag assembly 8. This movement and rotation is guided bythe J-pin and J-slot arrangement 30. Again, the collapsed locatormechanism 10 of the drag assembly 8 act as the drag mechanism to allowthe mandrel 4 to move relative the drag assembly 8 for subsequentoperations and the J-pin and J-slot arrangement 30 ensure that theposition is held until a compression or tension is applied to theintervention tool 2.

In a next step of the method, illustrated by FIG. 4 the interventiontool 2 is pushed into compression and the mandrel 4 and locator support18 rotate to align with the collapsed locator mechanism 10 of the dragassembly. In this position, the locator support 18 is located axiallyuphole of the locator mechanism 10, with an end of the locator support18 aligned with and abutting against an end of the collapsed locatormechanism 10. In this orientation, contact of the abutting ends allowsthe drag assembly 8 to be pushed downhole together with the mandrel 4,without the cone 16 contacting the slips 12. Compression through themandrel 4 pushes the drag assembly 8 downhole while the locatormechanism 10 is collapsed. Due to the position of the J-pin and J-slotarrangement, the mandrel 4 is unable to travel down far enough tocontact the cone 16; therefore, the packing element 14 cannot set whilerunning downhole as long as the locator mechanism 10 remains collapsed.

In a next step, illustrated in FIG. 5, the intervention tool 2 movesfreely downhole through the casing 36 until the collapsed locatormechanism 10 aligns with the matching profile 32 in the casingconnection 42. When the locator mechanisml0 is at the matching profile32, it extends radially outwards. Extension of the locator mechanism 10allows the mandrel 4 to move further downhole relative the drag assembly8 and for the locator support 18 to become positioned under the extendedlocator mechanism 10. In this way, the locator support 18 prevents thelocator mechanism 10 from collapsing as further compression is appliedto the intervention tool 2, and prevent the drag assembly 8 fromtravelling further downhole.

As illustrated in FIG. 6, continued compression of the intervention tool2 moves the cone 16 into contact with the slips 12 and the slips 12 areurged radially outward to contact an inner surface of the casing 36. Thepacking element 8 is also set. The locator mechanism 10, now positionedin profile 32, no longer moves downhole and the mandrel 4 and thelocator support 18 move downhole in compression such that the theytravel under and along the locator mechanism 10.

Once located in the profile 32 and with the locator support 18positioned underneath, the locator mechanism 10 further serves to lockthe intervention tool 2 into place and prevent it from jumping out ofposition due to any downhole travel that can occur with coil tubing orother piping reaction time from being deployed downhole. The locatormechanism 10 supported by the locator support 18 serves to absorb anysuch downhole travel energy and ensures that once located, theintervention tool 2 stays located.

With reference to FIG. 7, although the description above makes referenceto a profile 32 within a casing 36, and more preferably in a casingconnection 42, it would be readily understood that the presentintervention tool 2 is also locatable in downhole tool 22, including butnot limited to ported collars, sleeve tools, straddle perforatingequipment and others. In such cases, the intervention tool is deployedin much the same way as described above and can be located, asillustrated in FIG. 7, in a profile 32 of the downhole tool 22. Theprofile 32 take the form of any feature within the downhole tool thatcan receive the radially extended locator mechanism 10, or the profile32 may be machined specifically to fit the locator mechanism 10.

The locator mechanism 10 of the drag assembly 8 acts to generate dragbetween the drag assembly 8 and inner surface of the wellbore casing 36or downhole tool 22 when collapsed. This allows the mandrel 4 torotatably and axially move relative to the drag assembly 8, preferablywith the J-pin and J-slot arrangement 30 guiding this movement. Thelocator mechanism 10 further serves to prevent the slips 12 and packingelements 14 from setting prior to the locator mechanism 10 expandinginto the matching profile 32 in the downhole tool 22, since the J-pinand J-slot arrangement 30 and the locator support 18 prevent sufficientmovement of the mandrel 4 vis a vis the drag assembly 8 until thelocator support 18 can be positioned under the locator mechanism 10.

This arrangement ensures that the intervention tool 2 is positivelylocated in the profile 32, so that the slips 12 and packing element 14are set at the correct location in the downhole tool 22.

As illustrated in FIG. 7, once the intervention tool 2 is located andthe slips 12 and packing element 14 set, hydraulic pressure can beapplied either down the inner bore 6 of the intervention tool 2, orthrough the annulus 28 between the mandrel 4 an inner surface of thedownhole tool 22 to create pressure differential between an uphole endof the valve 24 and a downhole end of the valve 24, the uphole end beingisolated from the downhole end by the packing element 14. This pressuredifferential causes the valve 24 to shift from a closed position to anopen position and allows fluid to pass through the port 26 and out tothe formation to be treated or stimulated, or alternatively, allowsproduction fluids to travel in from the formation through the port 26and up to surface.

In the case of an exposed valve 24, it is also possible to open thevalve 24 by physically engaging the valve 24 and the use of mechanicalforce to move the valve 24 from a port-closed to a port-opened position.In such cases the intervention tool 2 can incorporate a mechanicalshifting mechanism (not shown) to engage the profile 32 and mechanicallymanipulate the downhole tool 22.

To remove the intervention tool 2 from inside the downhole tool 22 orthe casing 36, the intervention tool 2 can be pulled into tension torelease the packed off packing element 14 and pull the cone 16 away fromthe slips 12, thereby releasing engagement of the packing element 14 andslips 12 from the inner surface of either the downhole tool 22 or thecasing 36. Design of the J-pin and J-slot arrangement 30 causes themandrel 4 and locator support 18 to rotate relative to the drag assembly8, to allow the intervention tool 2 to be pulled into a section of blankcasing 36.

There are a number of steps and positions in the running in, locatingand setting of the intervention tool 2, and each position of theintervention tool 2 during operation is preferably set or guided by theJ-pin and J-slot arrangement 30, that ensure that the intervention tool2 stays in the desired position until a compression or tension forces itto move to the next J-pin/J-slot position.

In some cases, it is desirable to set the present intervention tool in asection of casing 36 either uphole or downhole from the downhole tool22. Such arrangement is desirable when pressure testing the casingstring and/or the downhole tool above the other downhole tools that havealready been opened, it is also useful when it is necessary to sand jetperforate between downhole tools.

In setting the present intervention tool 2 inside a blank section ofcasing 36, the collapsed locator mechanism 10 of the drag assembly 8again act as a drag mechanism between the intervention tool 2 and theinner surface of the blank section of casing 36, to allow relativemovement of these two components for subsequent operations.

Once the intervention tool has been pulled uphole into the blank sectionof casing 36, with reference to FIG. 8, the intervention tool 2 ispushed into compression. The mandrel 4 and locator support 18 rotaterelative to the drag assembly 8 so that the locator support 18 isaligned such that it can travel under and through the collapsed locatormechanism 10. In the particular case illustrated in FIG. 8, the locatorsupport 18 comprises lugs and a preferred embodiment of the locatormechanism 10 comprises spaced apart fingers; the locator support lugscan align with the spaces between the locator mechanism fingers and cantherefore travel through them. Further compression of the interventiontool 2 moves the cone 16 into contact with the slips 12 and the slips 12are urged radially outwards to contact the inner surface of the sectionof blank casing 36. The slips 12 now support compressive loads asfurther compression packs off the packing element 14, as illustrated inFIG. 8.

To release the intervention tool 2, it is pulled into tension to releasethe compression from the packed off packing element 14 and to pull thecone 16 out from under the slips 12. The mandrel 4 and locator support18 rotate and move axially relative to the locator mechanism 10 of thedrag assembly 8 to position the locator support 18 out from under thelocator mechanism 10 and uphole of the locator mechanism 10. The packer14 is unset and the intervention tool 2 can be moved uphole. Thecollapsed locator mechanism 10 of the drag assembly 8 act as the dragmechanism for subsequent operations.

In a final step, with reference to FIG. 11a , the intervention tool 2can be pulled to bring the J-pin and J-slot arrangement 30 back to aposition similar to the initial tension, neutral position of theintervention tool 2, and any of the steps above can be repeated asneeded. In a preferred embodiment, the mandrel 4 is prevented from beingpulled entirely out of the drag assembly 8 by means of a stop 38 formedon an inner surface of the drag assembly 8, which catches an end of thelocator support 18.

FIG. 9 represents a cross section of the locator mechanism 10 of thedrag assembly in a collapsed (FIG. 9a ) and extended (FIG. 9b )position. FIG. 10 represents a cross section the collet support lugs,showing the full bore opening 40. FIGS. 11b to 11c represent a number ofposition of the locator support 18 relative to the locator mechanism 10.

With further reference to Figure and 12, there are preferably 6positions of the J-pin and J-slot arrangement 30 used to control eachposition of the present intervention tool 2:

1. Compression neutral.

2. Tension to prepare to set at a profile.

3. Compression to set slips and pack-off the element.

4. Tension to prepare to set in blank pipe.

5. Compression to set slips and pack-off the element in blank pipe.

6. Tension neutral.

In the present arrangement, the room for tubing travel is provided bytwo movements: movement of the locator mechanism 10 into the matchingprofile 32; and movement of the locator support 18 under the locatormechanism 10 to hold the locator mechanism 10 in the extended position.This way there is always a positive locate without the intervention tool2 ‘jumping’ forward or out of alignment

The previous description of the disclosed embodiments is provided toenable any person skilled in the art to make or use the presentinvention. Various modifications to those embodiments will be readilyapparent to those skilled in the art, and the generic principles definedherein may be applied to other embodiments without departing from thespirit or scope of the invention. Thus, the present invention is notintended to be limited to the embodiments shown herein, but is to beaccorded the full scope consistent with the claims, wherein reference toan element in the singular, such as by use of the article “a” or “an” isnot intended to mean “one and only one” unless specifically so stated,but rather “one or more”. All structural and functional equivalents tothe elements of the various embodiments described throughout thedisclosure that are known or later come to be known to those of ordinaryskill in the art are intended to be encompassed by the elements of theclaims. Moreover, nothing disclosed herein is intended to be dedicatedto the public regardless of whether such disclosure is explicitlyrecited in the claims. No claim element is to be construed under theprovisions of 35 USC 112, sixth paragraph, unless the element isexpressly recited using the phrase “means for” or “step for”.

1. An intervention tool having one or more packing elements; said devicebeing moveable between a first position in which the device ispositively locatable within a profile, and a second position wherein thedevice is settable in a blank casing that lacks a profile, whereinmovement between the first position and the second position iscontrolled by axial movement of the intervention tool.
 2. A device forpositively locating within profile, wherein said device comprises: a.one or more locator mechanisms; b. one or more slips; c. one or morepacking elements; and d. a stopping mechanism; wherein said one or morelocator mechanisms are locatable within said profile and wherein saidstopping mechanism prevents engagement of said one or more slips andsaid one or more packing elements unit said one or more locatormechanisms are located in the profile.
 3. The device of claim 2, whereinsaid locator mechanisms are radially resilient and moveable from acollapsed position when not located in the profile, to a radiallyextended position when located into one or more profiles.
 4. The deviceof claim 2 wherein: said one or more locator mechanisms and said one ormore slips are arranged on a drag assembly part of the device; said oneor more packing elements are arranged on a mandrel part of the device,said mandrel being axially and rotatably moveable within said dragassembly and said stopping mechanism being arranged between said dragassembly and said mandrel.
 5. The device of claim 4, wherein said one ormore radially resilient locating mechanism, in the first collapsedposition, are engagable against an inner surface of the downhole tooland serve to generate drag between the inner surface of the downholetool and the drag assembly to thereby allow the mandrel to move axiallyand radially relative the drag assembly.
 6. The device of claim 5,wherein said mandrel further comprise one or more locator supports, saidlocator supports being rotatably moveable relative the one or morelocator mechanisms by application of an axial tension or compressiveforce on the device, between a first position in which the locatorsupports are passable under and through said collapsed locatormechanisms, a second position in which the locator supports abutend-to-end with said collapsed locator mechanisms, and a third positionin which the locator supports are underneath the radially extendedlocator mechanisms.
 7. The device of claim 6, wherein axially downholemovement of the device due to pipe travel is accommodated by movement ofthe locator supports under the locator mechanisms when the locatormechanisms are in the second extended position within the profile, toprevent the locator mechanisms from dislocated once located the profile.8. A method for applying downhole isolation, said method comprising thesteps of: a. running an intervention tool downhole, said interventiontool comprising one or more packing elements; b. locating one or morelocating mechanisms on the intervention tool into one or more profilesby shifting said device axially; c. engaging the one or more packingelements by shifting said device axially, after the locating mechanismsare located within the profiles; d. disengaging said one or more packingelements by shifting said device axially; and e. moving said device toanother downhole location.
 9. The method of claim 8, further comprising:a. moving said device to a section of blank casing lacking a profile;and b. setting said one or more packing elements in the blank casing byshifting said device axially.